Photographic shutter.



y No. 647,342. l Patented Apr. l0, |900.

.L. J. VGT.

No. 647,342. Patented Apr. lo, |900. l L. J.' vom.

PH'oToGnAPmc sHuTTE.

(Application led Jan. .10, 1898.)

3 Sheets-Sheetv 2 v (Model.)

l. IIHI No. 647.342. Patented Apr. I0, |900.

L. J. VOGT.

-PHuTuGlrmPHu: sHuTTEn. (Application led Jan. 10, 1898.)

(nodal.) 3 she't-sneet 3.

UNITED STATES PATENT Fries..

LOUIS J. VOGT, OF ROCHESTER, NET YORK, ASSIGNOR, BY MESNE ASSIG- MENTS, TO THE GERMAN-AMERICAN BANK, OFSAME PLACE.

PHOTOGRAPHIC SHUTTER.

SPECIFICATION forming part of Letters Patent No. 647,342, dated April.' 10, 190. Applica-tion filed dan nary 10, 18d/81 Serial No. 666,222 (No model.)

To @ZZ whom it may concern:

Be it known that I, LOUIS J.VOGT, a citizen of the United States, residing at Rochester,

New York, have invented an Improved Photographic Shutter, of which the following is a speciiication, reference being had tothe accompanying drawings.

Myinvention relates to an improved shutter for photographic cam-eras, which is' fully described and illustrated in the following f specification and the accompanying drawings,

left in Fig. l.

p exposure lever, and H the lever for adjusting the novel features being specified in the claims annexed to the said specification.

In the accompanying drawings, representingmvimproved sh11tterFi,gu1'e 1 is a front view. Fig. 2 is a side view as seen from the Fig. 3 is a side view as'seen from the right in Fig. 1. Fig. 4 is an elevation, the front plate being removed. Fig. 5 is a front elevatipn showing the exposingleaves and the actuating-beam. Fig. 6 is a partial front elevation showing the actuatingring. Fig. 7 represents the time-exposure mechanism'. Fig. 8 is a horizontal section on .the line 8 8, Figs. 4 and showing the parts below thatline. Fig. 9 represents the bayonetcatch attachment. Fig. l0 represents the setting-lever. Figs. ll to 1G, inclusive7 represent details.

In the accompanying drawings I have represented my improved shutter as constructed as part of an ordinary lens-mount, the lenses being inserted in the tubes A and B; but it will be understood that it can be used in any other relation with a photographic lens.

C is a suitable casing inclosing the exposing-leaves and their operating mechanism', which are placed on opposite sides of the perforated disk or diaphragm D.

E, Figs. l and 2, is the setting-lever, and F the exposing or releasing catch. G is the timethe tension of the spring.

I I', Figs. 5 and 8, are the Iexposing-blades, which are pivoted on the screws J J', being made of a shape adapted by opening and closing on their pivots, as indicated by the full' and dotted lines in Fig. 5, to allow light to penetrate through the opening of the lens. The leaves are connected together, so as to be operated simultaneously by the arched the central tube C', attached to the diaphragm D, under the pull of the spring M, which is attached at E2 to the ange F' on the barrel and at the other end to the inner end Gr2 of the tension-lever H. As indicated in Fig. 4, the

spring M is a coiled spiral'wound about more or less of' the periphery of the barrel.v The barrel N is connected with a toothed ring O, which acts on a pawl P, attached to the beam K. The toothed ring is provided with a series of projecting teeth T, of diderent lengths, on the circumference, so that by adjusting the ring so as to bring different teeth to act on the pawl the times of exposure may be varied. Thus in Fig. G the tooth T, which produces the shortest exposure, is about to act on the pawl P, which is pivoted to the beam by the stud R, and to force the pawl and beam outward, the return movement being secured by the spring U, Figs. 4 and 6. This spring also holds the pawl in the proper operative position, the end of the pawl B3, Fig. 4, being squared for this purpose. S is a stop fixed in the beam and against which the pawl bears and slides when one of the teeth T forces iis-outward. The lower end of the pawl swings away from the stop S in setting the shutter, when the teeth move `from right to left in Figs. 4 and 6. Exposures of any desired length may be secured by properly proportioning the teeth T. Thus T may be arranged to give an exposure of one twentyfifth of asecond; T', one-tenth; T2, one-fifth; T3, one-half; T4, one,.and T5 two seconds.

In order to bring the required tooth' into proper relation with the pawl P, the ring O, carrying the teeth T, is provided with the annular gear W, which meshes with the pinion X, which projects outside the casing, and the sliding dog Y is arranged so that the ring O may be disconnected from the setting-lever The dog Y is attached to the setting-lever IOO -Ward from the flange F'.

e einem more catches or teeth which engage with thc teeth of the annular gear W. When the slide YY is drawn outward, asindicated by the dotted lines in Fig. Il, the toothed ring G is discon nected Afrom the setting-lever and is free to be rotated independently thereof. Then by turning the pinion X, the gear WV and the toothed ring 0 are turned so as to bring any of the teeth on the-ring linto the proper operative relation with the pawl P. The arrow on the pinion X indicates the direction in which it should be turned so that the teeth 'll will cause the pawl P to swing away from the stop S, sind the length of the exposure can be varied without opening the blades. The liange F is partially cut away, so as not to interfere with the pawl P. The setting-lever E extends radially o'ut- The sliding degli( is attached to the setting-lever., so that it may be shifted thereon inward or outward to engage the teeth on its inner end with the annular ring of teeth W or to disengage the dog therefrom. When the dog is pushed in, as

Aindicated by the full lines| in ligs. 4 and l0,

the dog is engaged with the ring lW, and the barrel N, the' toothed ring 0, the gear W, and the setting-lever will swing as one piece about the central axis of the lensmount, the setting-lever being moved from E to E' to set the shutter before each exposure and-from- E' t0 E under the pull of the spring M in order to open the blades and allow the light to have access to the sensitive surface in the camera. To vary the length oi the exposure by changing the tooth which acts on the pa'wl and the arched beam, the operator draws the dog Y outward, and thus disengages the setting-lever, barrel, and spring from the toothed ring and its gear, and then'shifts the position of the ring until the proper tooth is brought 'opposite the pawl P by turning the pinion X, the edge oi which projects beyond the casing for this purpose. ln order to indicate to the operator When the required tooth is in proper relation with the pawl, I make a hole H2, Figs. 4 and 6, through the ange F and a corresponding hole l-ls in the front plate K', and l provide the toothed ring O with a series of marks N', indicating the length of the eX- posure which 'the shutter will produce When the particular number shows through the openings H2 lla. The numbers are so placed 0n the ring that they correspond `with the particular tooth which acts on'the pawl. Thus, for instance, in the case shown, when the shortest tooth is in position tomove the pawl, the number lth cornes opposite the openings. lt Will be observed that as the opening H2 is made through the ring li", which swings with the setting lever, the shutter must be set betere the length of the exposure is arranged.

` The exposing or releasing device consists of the stud or lug B', Figs. 4 and 7, the pivoted exposing-lever D', and the Apush or button F. 'lhe lever D' is pivoted at M' to the diaphragm, and it is provided with a lip or catch O', which engages with the pin B'. A spring P, Fig. e, is arranged in any suitable way to urge the free end of the lever D outward. The push F is attached to the lever 'D' lin any suitable Way.

In order to provide for making an exposure from a bulb7 l employ an expansible bag R', Fig. e, or other suitable device under the lever D' and arrange a nipple S to communicate With it. A bulb being connected with the nipple pressure on the bulb operates the lever. The bag R' lies between the casing C and a flange ,ou the inner side of the lever, and the entrance of air under 'pressure into the bag dilates it and produces the exposure. The nipple S' may be arranged to swing with the lever D' or the nipple may be screwed into a block U', to which the bag is attached and to Which the lever is pivoted.

The mechanism for producing time exposures'will be understood from Figs. 4 and 7. A link V' extendsfrom the pivot W at the inner end of the lever G to a pin or screw X' on the exposing-lever D'. The link V. has the stops Z Z' formed on it. The lever E has a .projection E3 on it, which comes against the stopv Z when the link is shifted into its path by placing the lever G at G. The link V is slotted, as shown at V2, where it engages with the. pin X' to permit the relative movements of the link and the lever. The timelever G is pivoted to the diaphragm at GE. When the link V' is shifted outward by the movement of the lever G into the position indicated by the dotted lines'in Figs.v LL and 7, thestop Z'is interposed in the path of thc lug E3, and the movement of the toothed ring 0, with its teeth T, is arrested with blades open. The lug E'iirst catches on the slop Z, and then onv the release of the pressure on the push F or on the bulbrthe spring P' Vforces the lever D' outward, and this shifts the position of the link V', so that thc lug E3 slips oli of stop Z and engages with the stop Z', where it remains until another pressure on F or on the bulb moves the link inward and disengages the lug from the stop Z', so as to permit the closing of the blades by their actuating-spring M and the transmission mechanism described. The toothed ring O is pref erably set with one of its longer teeth opposite the pawl for time exposures. The lug Y E3 is turned up onthc end ot' an arni on the setting-lever, and the stopsv Z Z' are turned down from projectingportions of the link. The lever G is held in any position in which it may be placed by the friction of a spring Washer or other suitable device.

ln order to further regulate the speed of the exposures and to make it uniform at all times, i employa Hy or fan Y', Figs. i and 8, which is connected to the flange or ring ll" of the setting-lever by a suitable train of gea-ring, so as to be operated thereby. A segmental ring of teeth A', Fig. Il, is attached to or out on the ring F., and this engages with the pinionfvA?, which drives the gear A3, which IOO e4 A5 A@ imparts :i when the shutthrough pinions and gear."- a rapid revolntionto the i ter is in operation. The fan, gears, au c ,"nions are carried bysuitable shafts, suppe .ted at the inner ends byjournals in the diaphragm D and at the outer ends by the plate D?, secured to the diaphragt in any suitable way, or, as in the construction shown, the .ian and its gearing and shafts are mounted between two plates D2 D3, secured together by screws D, passing through sleeves B5, Fig. S, and thus making4 the fan and its driving mechanism removable as a whole from the casing.

- D are screws which secure the fan mechanism in place.

l attach the shutterto the :t'ront F2 of the camera by the detachable joint shown in litige. 3 and 9. The circular plate B2 is peritly attached to the front. The shutter 1 two or more studs C2, having grooves cut around their projecting portions, and which enter corresponding holes in the plate B5'. inleveren the plate B2 and the front is arranged the movable vplate li-Which is provid l with slotted openings of the form shown at Jj, lfig. Si, adapted to admit the studs into the openings and to engage in the grooves around their heads when the plate is rotated a short distance, as indicated by the arrowin Fig. 9. The plat-e l2 is free to turn on the 'plate 132, which is shouldered to receive it. 'ihe edge ot' the plate I2 is flanged outward or (lished, and it is preferably milled in order tofacilitateits manipulation. ,Asinglemovement of the plate l2 in either direction attaches or detaches the shutter from the camera, while the joint is absolutely light-tight. The edge of the slots in the plate l2 may be beveled or inclined in order to draw the shutter tightly against the plate B2.

The ten sion-lever H is held in place by friction 'iroduced by a spring-washer on its pivot.

M2, Figs. 8 and 8, is a casi-ng for aniris-diaphragm, and .N2 a-lever for operating the same. lf the iris-diaphragm is not used, the tube ll is attached directly to the plate O2 at the rear of the casing.,

It will be understood that my improved shutter may be constructed with only one tooth l, attached to the ring F', the annular gear lV and the pinion X being omitted. The train of gearing and the iiy may be omitted; but by their use l secure greater uniformity in the lengths of the times of exposures. The shutter may also be built so that the gearing and fly may be thrown in and out of use at the will of the operator. The spring U bears on'the shoulder B3 on the pawl P and holds it in contact with the stop S, While perinitting it to swing away during the setting of the shutter or when the toothed ring O is rotated to vary the time of exposure. The tension-lever H may be omitted.

J J', Fig. 8, are screws which secure the dia- The casing C is shouldered interiorly to receive the edge ot' the diaphragm.

l claimm K l. The combination with the movable leaves, oi:` the rotating actuating-ring, having teeth of lengths di'li'erent cireuniterentially thereon, the train of gearing and the ily, substantially as described.

2. The combination with the movable leaves, .of the arched beam havin g the pawl thereon, the rotating actuating-ring, the gearing and the iiy, substantialljyr as described.

The combination with the movable leaves, of the rotating actuating-ring, having teeth ci lengths different circumterentially thereon, means for shifting said ring to secure varying exposures, the train ot gearing and the fly, substantially as described.

e. The combination with the movable leaves,

of the rotating actuatio g-rin g, having teeth of lengths different circumferentially thereon, and a toothed ring attached thereto, a pinion meshing with said lring and projecting beyond the case, the train of gearing and the fly, substantially as described.

5.* The combination with the movable leaves of the rotatable toothed actuating-ring, the tube or barrel connected thereto, and a suitable spring Wound about the barrel, substantially vas described.

G. The combination with the movable leaves of the rotatable actuating-ring, having teeth of different lengths thereon, the tube or barrel connected thereto, and a suitable spring Wound about the barrel, substantially as del scribed. i

7. The combination with the pivoted leaves, of the arched beam, the pawl, the toothed actuating-ring and the spring for closing the blades, substantially as described.

8. The combination with the pivoted blades of the arched beam, the pawl pivotod thereon, a stop on the beam for the paWl, the returnspring which also holds the paWl against the stop, and suitable actuating mechanism, substantially as described.

9. The combination with thecentral tube C of the barrel N arranged to rotate thereon, the coiled spring M Wound about the barrel, the toothed actuating-ring, the pivoted blades, suitable intermediate operating mechanism, and suitable releasing mechanism, substantially as described.

l0. The combination with the central tube C ci the barrel N arranged to rotate thereon, the coiled spring M Wound about the barrel, the ring F provided with the setting-lever and the toothed segmenti-lf, the train of gearing, the fly, the toothed actuatingring, the pivoted blades, suitable intermediate operating and releasing mechanism, substantially as described.

ll. As a means for operating au exposingblade in a photographic shutter, a rotatable ring having teeth of different lengths, a spring pin-ogm D to the rear plate of the lens-mount.

for rotating the ring, suitable connecting 4 news/le bladeoperating mechanism, and mechanism for varying the position of the ring relative to the connecting devices, whereby exposures of varying duration are secu red, substantially as described. Y

l2. The combination with the central i ube C' of the rotating` barrelN thereon, the spring M, the ring F having setting-lever E attached thereto, the slidingl dog Y on the setting-lever, the toothed ring O having annular gear W, the pivoted exposing-blades and suitable intermediate operating mechanism, substantially as described.

13. The combination With the central tube C/ of the rotating barrel N thereon, the coiled spring M Wound about said barrel, the ring F with an actuating-tooth T, the setting-lever E, suitable releasing mechanism, the pivoted blade and'suitable connecting operating mechanism, substantially as described.

14. The means for actuating the exposing mechanism of a photographic shutter, consisting of a rotating barrel, a suitable spring Wound thereon, suitable connecting operating mechanism, and a releasing; device, substantially as described.

l5. The means for actuating the exposing mechanism of a photographic shutter, consist ing of a rotating barrel, a coiled spiral spring Wound thereon, suitable connecting operating mechanism, and a releasing device, substantially as described.

l 6. The combinationjn a photographic shu t ter, of the diaphragm D, the pivoted blades and. the arched beam on one side of the diaphragm, actuating mechanism on the other side consisting` of a rotating toothed ring, an actuatin g-spri1ig,and suitable releasing 1n echanism, substantially as described.

17. The combination with the pivoted ex posing-blades of a photographic shutter, of the setting-leverE havingl lug E', the ring h", a tooth T arranged to operate the blades through suitable mechanism, the link V' hav .ing stops Z Z", and means for shifting the link into the path oi' the lug, substantially as de scribed.

LOUIS J. VOGT.

XVitnesses:

HENRY M. RnIcnnNnAvH; GEO. B. SnLnnN. 

